Extrusion press for forming rods and the like from metal billets



Dec. 7 1926. 1,609,988

G. BULL EXTRUSION PRESS FOR FORMING RODS AND THE LIKE FROM METAL BILLETSFiled June 14 1924 3 Sheets-Sheet l AID= a I E 't 1-! 0 F Dec. 7 1926.

EXTRUSION PRESS FOR LIKE FROM METAL BILLETS 3 Sheets-Sheet 2 Dec; 7

G. BULL EXTRUSION PRESS FOR FORMING RODS AND THE LIKE FROM METAL BILLETSLing t Patented Dec. 7, 1926.

Uni-ran s rArss PATENT orr cs,

Gnonen BULL, on LEEDS, Enemmn, nssrenon 'ro HENRY BERRY AND COMPANYLIMITED; 015 LEEDS, ENGLAND.

. nx'rnusxonrnnss "ma FORMING nons AND THE uni anon METAL mrinnrs.

Application met me 1a, 1924, Serial No. 720,005, and in Great BritainJanuary 17, 1924.

This invention relates'to that type of extrusion press in which themetal of a billet carried a container is extruded through a die to forma rod or the like (hereinafter termed rod) by e fi'ecting' relativemovement between the said container and the said die.

Hitherto, the die has been located apart from the container and formedon "or fixed to the lower end of a stationary tubular member, the saidcontainer being closed at its lower or rear end and the billetpassedthereinto by way of its open upper or forward end prior to effecting theextrusionstroke. I

Now the object of this present invention is to provide an improvedextrusion press, as hereinafter described, for forming rods-from metalbillets, whereby the extrusion defects due to skin friction are reducedto a ruinimum and the power required to extrude the rod is substantiallylessened. In an extrusion press according to this invention for formingrods from metal billets, the die and metal billet are passed into acontainer by way of its open rear end until the die comes to restagainst the rear end of a stationary tubular plunger projecting into theforward end of said container and the open rear end of the container isthen sealed and the sealed container moved forwardly upon the stationarytubular plunger so as to extrude the metal of the billet through thestationary supported die to form a rod.

In a convenient form of construction, the die and metal billet are firstmoved together forwardly into the container by a pusher bar until thedie comes to rest against the rear end of a stationary tubular plungerpro ecting into the forward end of said container, the open rear endofwhich is now sealed by :a gag piece and the sealed container movedforwardly upon the stationary tubular {plunger so as to extrude themetal ofthe 'Qbil'let through the stationarily supported die to form .arod which is projected forwardly throu h the stationary tubular plungerdure forward travel of the sealed container. The forward travel orextrusion stroke of the sealed container is such as to leave a residualpiece of metal on the-rear fend of the formed rod, and after suchextrus'ion stroke the container minus its gag piece is moved furtherforward upon the stationary tubular plunger so as to leave the residualendof the rodv clear of therea-r end of the container to enable theresidual piece of metal to be removed from the formed rod and the latterto be drawn out from the press.

The invention will now be described with reference to the accompanyingdrawings;

wherein':--

Figs. 1 and 2 are respectively a sectional plan view and a partsectional side elevation of a hydraulic extrusion press in accordancewith this invention; while Figs. 3 to 12 inclusive are sectional planviews of a part of the same press illustrating the various stages in themanufacture of a rod.

Referring particularly to Figs. 1 and 2 of the drawings, 1 is areceiver, 2 the die, 3 the metal billet, 4 the container, 5 the pusherbar, 6 the stationary tubular plunger, 7 the gag piece, 8 double-actingrams, 9 a main ram, 10 clamps,.11 draw-back rams, and 12 a saw.

Referring now particularly to Figs. 3 to I 12 of the drawings, the die 2and the metal billet 3 are first placed in the receiver 1 versely so asto bring the die 2 and metal billet 3 into alignment with the container4 (Fig. 4), after which the die 2 and metal billet 3 are together movedforwardly by the pusher bar 5 into the container 4 until the die 2 comesto-rest against the rear end of the stationary tubular plunger 6 whichprojects into the forward end of said container 4 (Fig. 5), whereuponthe pusher bar 5 is withdrawn and the gag piece 7 moved trans versely soas to bring it into alignment with the open rear end of the container 4(Fig. (3). e

The container 4 is now moved rearwardly through the medium of thedouble-acting rams 8 up against the gag piece 7 so as to seal the openrear end ofthe said container 4 (Fig.7 and also Fig. 1), when the sealedcontainer 4 is moved forwardly upon the when the receiver 1 is movedtrans-' stationary tubular plunger 6 by the main ram 9 so as to extrudethe metal of the billet 3 through the stationary die 2 to form a rod 3which is projected forwardly through'the stationary tubular plunger C)during the forward travel of the sealed container 4, the stroke of themain ram 9 being such as to leave a residual piece of metal 3 on therear end of the formed rod 3 (F ig. 8). The double-acting rams 8 nowmove the container 4 further forward upon the stationary tubular plunger6 so as to leave the residual piece of metal?) of the rod 3* clear ofthe rear end of the container 4 (Fig. 9), when the gagipiece 7 is movedtransversely so as to bring the clamps 10 into alignment with theresidual piece of metal 3 on the rear end of the rod 3 (Fi 10), afterwhich the clamps 10 are moved orwardly by the main ram 9 and screwed upupon the residual piece of metal 3 on the rear end of the rod 3* (Fig.11), whereupon the clamps 10 and parts associated therewith aremovedrearwardly by the draw-back rams 11 so as to Withdraw the residualpiece of metal 3 together with the rod 3 and die 2 rearwardly clear ofthe container 4 (Fig. 12). The saw 12 is now lowered and the formed rod3 severed thereby from the residual piece of metal 3 when tllQ'fOIlIlQdrod 33 is free to be drawn out forwardly from the press by way of thestationary tubular plunger 6. a

- \Vhat I claim as my invention and desire to secure by Letters Patentis 1. An extrusion press of the type specified for forming rods frommetal billets, comprising in combination a billet container open at itsrear end, a stationary tubular plunger projecting into the forward endof the container, a die for the container, means for inserting the dieand a metal billet for- Wardly into the container by wayof its open rearend until the die comes to rest against the rear end of the stationarytubular plunger, this operation taking place without any extrusion ofthe billet occurring, means for sealing the open rear end of the billetcontainer, and means for moving the sealed container forwardly upon thestationary tubu lar plunger so as to extrude the metal of the billetthrough the stationarily supported die to form a rod.

2. An extrusion press of the type specified for forming rods from metalbillets, comprising in combination a billet container open at its rearend, a stationary tubular plunger projecting into the forward end of thecontainer, a die for the container, a pusher bar for inserting the dieand a metal billet together forwardly into the container by way of itsopen rear end until the die comes to rest a ainst the rear end of the;stationary tubu ar plunger, this operation taking place without anyextrusion of the billet occurring, a gag piece for sealing the open rearend of the billet container, and means for moving the sealed containerforwardly upon the stationary tubular plunger so as 1.eoe,oss

to extrude. the metalpof the billet through the stationarily supporteddie to form a rod which is projected forwardly through the stationarytubular plunger during the forward travel of the sealed container. I

3. An extrusion press of the type specified for. forming rods from metalbillets, comprising 1n combinatlon a billet container open at its rearend, a stationary tubular plunger projecting into the forward end of thecontainer, a die for the container, a pusherbar for inserting the dieand ametal billet together forwardly into the container by Way of itsopen rear end until the die comes to rest against the rear end of thestationary tubular plunger, this operation taking place without anyextrusion of'the billet occurring, a gag piece for sealing the open rearend of the billet container, and means for moving thesealed containerforwardly upon the stationary tubular plunger so as to extrude the metalof the "billet through thevstationarily supported die to form a rod andleave within the sealed 0on taiuer a residual'piece of metal on the rearend of the formed rod.

4. An extrusion press of the type specified i for forming rods frommetal billets, com prising In combination a billet container open at itsrear end, a stationary tubular plunger projecting into the forward endof the container, a die for the container, a

pusher bar for moving the die anda metalbillet together forwardly intothe container by way of its open-rear-end until the'die comes to restagainst thef rear end of the" stationary tubular plunger, a gag pieceforsealing the open rear end'of thebilletcon tainer, means for movingthe sealed con-,

tainer forwardly upon the stationary tubu-- lar plunger so as toextrudethe metalof the; billet through the stationarily supported dietoform a rod and leave within the sealed container a residual piece ofmetal on the rear end of the formed-rod, and means for moving thecontainer minusitsgag piece further forward upon the stationary tubularplunger so as to leave the residual end of the rod clear of the rear endof the con miner, together With means forremovin the'residual piece ofmetal from the formed rod to enable the latter to from the press.

In witness whereof I have hereunto set my hand.

be' drawn out GEORGE BULL; I

